baber/WOPTO huggingface dataset:
Patent GB-832863-A (GB)
Title: Improvements in or relating to signal compression and expansion arrangements for electric communication circuits
Inventor: NORMAN PETER
IPC: H04B1/64
Filed: 1957-12-23
Abstract: 832,863. Automatic volume control. STANDARD TELEPHONES & CABLES Ltd. Dec. 23, 1957, No. 39834/57. Class 40 (4). In a companding arrangement the voltage amplification factor of the system between a compressor and an expander is chosen so that the voltages across non-linear resistors with the same current-voltage characteristics in the compressor and expander are the same. In the arrangement shown in Fig. 2, it is necessary that the output voltage V4 from the expander 10 should be independent of the values of non- linear resistors 6 and 11 and this condition implies that the resistors of the expander must be related to the resistors of the compressor such that R3=R1+R2, and R4=R2(R1+R2)/ R1. This assumes signal sources V1 and V3 of zero impedance and outputs of infinite impedance. If, as the invention requires, the voltage input to the expander produces the same voltage across non-linear resistor 11 as is produced across non-linear resistor 4 in the compressor, then the voltage gain V3/V2 of the line 8 must be (R1+R2)/R1. This gain may be obtained by the use at each end of the line of suitable amplifiers which may also be utilized as impedance matches. The existence of impedance at the signal sources and outputs in no way alters the conditions set out above, all the impedances being expressible in terms of equivalent resistors R1 to R4; this may also be done with the arrangement of Figs. 5 and 6 (not shown) where a number of stages of compression and expansion are used, each stage being separated from the next by a buffer amplifier. The non-linear resistors may comprise oppositely connected rectifiers in shunt, as shown, or be silicon carbide resistors.
Patent GB-1437336-A (GB)
Title: Dewatering of slurries
IPC: D21F1/00
Filed: 1972-08-26
Abstract: 1437336 Dewatering slurries G F SHATTOCK 7 Aug 1973 [26 Aug 1972] 39920/72 Heading F4G [Also in Division B1] Slurry dewatering apparatus comprises a dewatering screen 12 of flexible inextensible material not greater than 65 thousandths of an inch in thickness, the screen being passed through pressure rollers 16 to wring moisture out of the slurry. Screen 12 is driven solely by the rollers 16 and comprises an endless belt. In use aerated slurry is fed initially to a grit trap 64 having a wire container 82b for collecting solid objects, the slurry passing through baffles 84 to a feed shoot 88 feeding slurry on to screen 12. Moisture pressed out by the rollers 16 collects in a tray 40 and is removed by outlets 48, 50. The pressure exerted by the rollers is adjustable by means of a screw device 18. Slurry is removed from the belt by a brush 30, rotated through a belt 32, the pressure exerted by the brush being adjustable by means of a lever 34 and weights 38, the slurry then falling into a hopper 92, Fig. 11 (not shown), from which leads upwardly an Archimedian screw elevator (96) driven by a belt 102. In a modification of the apparatus, two belt screens are provided, one above the other, the finer mesh screen being provided below the coarser mesh screen for successive dewatering operations. The screen may be made from an artificial textile material, or from metallic material, glass fibre coated with polyvinyl chloride, polypropylene, and may be coated with a polyurethane varnish.  Slurries which may be dewatered using this apparatus include effluent, fibrous organic, and animal, such as pig or chicken manure.
Patent GB-1510067-A (GB)
Title: Slug-killing and snail-killing agents
IPC: A01N37/26
Filed: 1976-09-28
Abstract: 1510067 Denatured metaldehyde compositions F HOFFMANN - LA ROCHE & CO AG 28 Sept 1976 [29 Sept 1975] 40203/76 Heading ASE A slug- or snail - killing agent contains metaldehyde, benzyldiethyl - (2, 6 - xylylcarbamoylmethyl) - ammonium benzoate (denatonium benzoate) as denaturant, and if desired a bait. Optional ingredients are fillers pigments and antimicrobic agents such as dehydroacetic acid, sorbic acid and salts thereof and 2, 2 - dihydroxy - 5, 5' - dichlorodiphenylmethane.
Patent GB-854943-A (GB)
Title: Low noise electron gun
IPC: H01J23/075
Filed: 1958-12-16
Abstract: 854,943. Electron guns. HUGHES AIRCRAFT CO. Dec. 16, 1958 [Jan. 8, 1958], No. 40592/58. Class 39(1). An electron gun comprises a cathode projecting an electron beam past an accelerating electrode in a forward direction, the source of the beam being a side emissive region of the cathode emitting electron predominantly transversely to the forward direction, and magnetic and electric fields being provided to produce forces containing a major portion of the emitted electrons to form the beam but precluding electron having a forward velocity component algebraically less than a predetermined velocity from entering the beam. In this manner it is stated that advantage is taken of a full Maxwellian velocity distribution in the forward direction and by elimination of electrons with high negative velocity components in this direction the deviation between average velocity and root-mean-square velocity is reduced thereby reducing the noise figure. As shown in Fig. 4, a hollow electron beam may be formed by a side emitting cathode 88 at potential Vo a profile-forming electrode 94 at potential Vo and a first accelerating electrode 96 at a potential V 1  where V 2 >V 1 >V 0 . Such a cathode may be provided with a negative grid probe disposed coaxially therein. An annular beam may be formed by the arrangement shown in Fig. 6 wherein a hollow cylindrical cathode 118 has two rings of emissive material disposed concentrically on an inner and outer surface of the cylinder and the profile-shaping electrode has corresponding inner and outer portions 122 and 120 respectively. In another embodiment a ribbon-shaped beam having the desired characteristics is formed. Examples are given of suitable dimensions, voltages and interelectrode spacings.
Patent GB-1403485-A (GB)
Title: Radar systems
IPC: G01S7/04
Filed: 1961-11-14
Abstract: 1403485 Pulse radar AVIATION MINISTER OF 14 Nov 1962 [14 Nov 1961] 40776/61 Heading H4D  A radar system comprises means for transmitting pulse signals and for receiving signals reflected from targets, a plurality of range gates each for gating a received signal corresponding to a different range, a plurality of modulation detecting means each controlled from a different range gate for detecting the Doppler modulation of signals received from a moving target and displaying the detected signal as modulations of a light source, and viewing means for viewing the light sources to give linearly displaced images thereof, whereby a moving target is displayed by that light source which corresponds to the range of the target and the number of modulations of the source along the displacement line indicates the frequency and hence the rate of radial movement of the target. As shown, an aerial 1 is connected via a T-R unit 2 to a receiver 3 and a transmitter 4 controlled by a pulse modulator 5. The receiver 3 feeds a number N of modulation detectors 6 each controlled by a range gate circuit 7. The modulator 5 feeds a delay cell 8 supplying delayed pulse outputs in order of increasing delay to corresponding range gate circuits 7. The detectors 6 feed through a modulation frequency amplifier 9 individual range displays comprising modulated light sources 10. A glass squaresection prism 13 is rotated by a motor 11 in front of the light source 10 which are viewed in the direction A through a glass screen 14. The circuits 7 cover a 1000 metre range band the position of the band in the overall range (0- 6000 metres) being determined by the pulses derived from modulator 5. Each 1000 metre band comprises discrete range points the number of which corresponding to the number N of circuits 7. Each circuit 7 covers a range subband corresponding to one pulse length of the transmitter 4. In operation a modulation signal derived from a reflected signal from a target modulates the light source 10 corresponding to that range. An observer at A sees the modulated light source, owing to the rotating prism 13, as a series of linearly displaced images extending at right angles to the axis of the prism. Fig. 2 shows a display, the linear displacement paths of images of the light sources being indicated by lines 16 and modulation signals being shown on range lines a.b.c. The higher the modulation frequency the greater the number of light flashes appearing on a range line 16. The system is intended for forward area surveillance for detecting men, tanks &c.
Patent GB-928376-A (GB)
Title: Improvements relating to automatic telephone systems
Inventor: PRICE BENJAMIN WILLIAM JOHN
IPC: H04Q3/00
Filed: 1959-12-02
Abstract: 928,376. Automatic exchange systems. ASSOCIATED ELECTRICAL INDUSTRIES Ltd. Nov. 25, 1960 [Dec. 2, 1959], No. 41003/59. Class 40 (4). An adaptor circuit interposed between a subscriber's line and the line circuit operates in response to a permanent loop condition to lock the line out of service and to mark it busy in the final selector multiple. In Figs. 1A, 1B, after the line is looped a thermal relay TH having an operating lag of about one minute is connected up by earth on the private wire when a first group selector is seized. The emitter potential of a transistor TR1 is changed by virtue of resistances R2, R3, so that, in the normal case, it conducts when the base becomes more negative at the first dialled impulse. Dialling relay CD energizes, locks to the private wire and disconnects TH. If, however, no impulse is received before TH pulls up, permanentloop relay PG energizes, locks over the line, disconnects it from the line circuit and marks it busy by opening wire 17. An alarm is given over wire 18. Relay CD has a winding in series with cut-off relay K so that it energizes when the line is seized by a final selector and disconnects TH. In another arrangement, Figs. 2A . . . 2H (not shown), the line-circuit adaptor circuit comprises the permanent-loop relay only and works in conjunction with an adaptor circuit associated with the first group selector. A thermal relay in the latter circuit is connected up on seizure of the selector and, in normal operation, is disconnected by a relay which falls back at the end of the first digit. If allowed to pull up the thermal relay connects positive pulses, e.g. rectified ringing current, to the private wire to operate the permanent-loop relay. This arrangement may be modified to provide a " barred trunk " facility. In the group selector adaptor circuit, Fig. 4, the positive pulses are applied by the operation of the thermal relay THB and relay BR on a permanent loop condition or by post springs NP1 if the selector is set to a particular level. Relay BT, Fig. 3, responds, locks over the line and supplies NU tone from wire 43. This relay is made slow-releasing so that it is not affected by continued dialling.
Patent GB-1328574-A (GB)
Title: Chlorination process
IPC: C07C255/10
Filed: 1971-09-06
Abstract: 1328574 Chloromethacrylonitriles TAKEDA YAKUHIN KOGYO KK 6 Sept 1971 [18 Sept 1970] 41360/71 Heading C2C 3 - Chloro - 2 - cyano - propane and/or 1,3- dichloro - 2 - cyano - propene are prepared by chlorination of methacrylonitrile in the gas phase at elevated temperature in the presence of water vapour.
Patent GB-936173-A (GB)
Title: Improvements in and relating to iron-base alloys
IPC: C22C38/56
Filed: 1961-11-20
Abstract: A wear-resistant alloy for use at temperatures up to 1100 DEG  F., particularly in nuclear reactors has the following percentage composition by weight: .C.2-3.5 .Cr.12-20 .Mo.12-20 .Si.0.5-1.5 .Ni.0-3.5 .Co.0-3.5 .Mn.0-0.5 .V.0-2.5 .Fe.the balance The alloy may be stress relieved by heating to 375-1100 DEG  F for 1-4 hours and in one example the alloy was heat-treated by heating to 1950 DEG  F. for 1 hour, air cooling and reheating to 375 DEG  F. for 1 hour.  The alloy is particularly suitable for bearings, valves and guides.
Patent GB-915015-A (GB)
Title: Improvements in or relating to apparatus and method for folding sheet material
Inventor: MILLICH THOMAS LOUIS
IPC: B31B5/00
Filed: 1960-12-01
Abstract: 915,015. Folding edges. MILLICH, H. L. Dec. 1, 1960, No. 41397/60. Class 42 (1). ). [Also in Groups XVI and XVII] A method and apparatus in which two marginal portions 5, 3, 6 and 7, 4, 8 of a box blank in the form of a sheet are folded on to the body 2 of the sheet by moving said sheet with one said marginal portion foremost and folding it during said movement, 19-20 (Fig. 11), reversing said sheet to cause reversal of leading and trailing edges and top and bottom faces, 20-22 (Fig. 11), and folding the new leading edge during continued movement. Folding during sheet movement is achieved by the use of spring- urged catches 35, 37 and 74. Diagonal folding of flaps 27, 28, (22-25 Fig. 11), is carried out, as shown at Fig. 1B, by the use of conventional ploughs 70, belts 71, 72 hold down strip 69 and spring-urged flap catches 66. Glue is applied as required at 25, Fig. 11, and the box finally folded as at 26, Fig. 11.
Patent GB-1334443-A (GB)
Title: Metering device
IPC: F04B13/02
Filed: 1971-08-06
Abstract: 1334443 Reciprocating pumps A FERRARI 6 Sept 1971 [10 Sept 1970] 41518/71 Heading F1A [Also in Division B1] Apparatus for proportioning two liquids supplied to a mixing head 1 comprises a doubleacting reciprocating hydraulic motor 10 driving the piston rod 6 of a single acting reciprocating metering pump 3, the rod having a rack 7 which through a gear train 11, 15, 16 actuates a second rack 5 and pump 2. The gear train is mounted upon an adjustable carriage 12 which may be exchanged to alter the pumping ratio. The stroke of the motor is reversed by limit switches 20, 21; switch 21 is, and 20 may be, adjustable to vary the length of stroke. The pump valves 24, 25, 26, 27 may be check valves or be electromagnetically operated by the limit switches.
Patent GB-982510-A (GB)
Title: Regeneration of isobutylene
IPC: C07C7/171
Filed: 1963-10-22
Abstract: Isobutylene is recovered from a 60-65% sulphuric acid extract by mixing at least 0.4 lb. of steam/lb. of reacted isobutylene with said extract and immediately heating to 275-325 DEG  F. The steam may be injected into the extract immediately prior to passage through a heatexchanger where residence times of less than 0.01 second and pressures of 0-50 p.s.i.g. are specified.
Patent GB-946122-A (GB)
Title: Improvements in or relating to valve means for controlling release of pressure from fluid pressurised systems
IPC: B60T15/04
Filed: 1960-12-02
Abstract: 946,122. Fluid-pressure brakes. KNORRBREMSE G.m.b.H. Dec. 2, 1960 [Dec. 5, 1959], No. 41642/60. Heading F2F. A pressure release valve comprises a safety valve to limit the pressure in the system, an inlet valve controlling the flow into a control chamber containing a spring-loaded piston which closes the inlet valve at a predetermined chamber pressure, continuous venting means from the chamber to atmosphere and piston movement responsive means to provide linear pressure drop in the system by varying the venting rate from the chamber by movement of the inlet valve. The venting valve 9, which may be used for controlling the release of pressure from a driver's brake valve, is connected to a pressure system represented by a reservoir 5 to which fluid may be introduced by a shut-off member 1 and a nozzle 3. The valve 9 has a chamber 7 connected to the system and separated by a partition 11 from a control chamber 13. The partition has an axial bore 19 providing a valve seating 17 in the chamber 7 and having radial vent passages 21. The control chamber 13 is limited by a piston 15 having a pistonrod 23 extending with clearance through the bore 19 and formed with a sealing plate 25 co-operating with the valve seat 17. The piston-rod has an axial bore 27 closed at the end remote from the plate 25 by a sealing plate 33 loaded by a spring 31 in a chamber 35 vented to atmosphere. An annular groove 37 in the piston-rod allows a large through-flow from the chamber 13 to the vents 21 when the valve 17, 25 is wide open. When filling the reservoir 5 by opening the shut-off member 1, compressed air flows into the chamber 7 and, as valve 17, 25 is held open by spring 31, into control chamber 13. At a predetermined low-pressure stage the piston 15 moves against spring 31 to close the valve 17, 25 to a condition where the flow through the valve is in equilibrium with the venting through the passages 21. Above this pressure the safety valve 33 opens and prevents a further rise in pressure in the reservoir 5. On closing the member 1 the pressure in the reservoir falls slightly as the valve 33 closes and venting continues by way of the control chamber 13. Since the piston 15 in conjunction with spring 31, valve 17, 25 and vent passages 21 maintain a constant pressure in the chamber 13, a pressure drop linearly dependent on time is produced in the system. When the system pressure falls to that in the control chamber 13, the piston moves to the right to open the valve 17, 25 and to connect the passages 21 with the chamber 13 by the groove 37. The venting retardation caused by the decreased pressure difference is thus substantially compensated by the reduced flow resistance and pressure drop continues substantially linearly until the system is fully vented.
Patent GB-1284866-A (GB)
Title: Improvements in or relating to cabinets with fastenable drawers
Inventor: DICHMANN WOLFGANG
IPC: E05B65/46
Filed: 1970-09-01
Abstract: 1284866 Latches W DICHMANN 1 Sept 1970 [1 Sept 1969] 41861/70 Heading E2A A cabinet drawer is fastened in its closed position by a latch which is freed by the rotation of a non-circular rod 8. In the form shown in Fig. 1a, this rod is loaded by spring 11 so that it acts as the latch and engages a nose 2 on a lateral wall 1 of the drawer so preventing opening of the latter. In the form shown in Fig. 2a, the latch bolt 2 is carried on a spring arm 3 on the drawer and may be freed from detent 5 by the rod 8, as indicated. In Fig. 3a, the rod 8 is, itself, shaped to pass (as shown) or when turned 90‹ to detain the bolt 2.
Patent GB-1450979-A (GB)
Title: Ink feed roller arrangement
IPC: B41F31/14
Filed: 1974-09-26
Abstract: 1450979 Ink-feeding devices POLYGRAPH LEIPZIG KOMBINAT FUR POLYGRAPHISCHE MASCHINEN UND AUSRUSTUNGEN VEB 26 Sept 1974 [27 Sept 1973] 41862/74 Heading B6C  In an ink-feeding system wherein a transfer roller is displaceable between positions where it contacts a ductor roller and a rest position out of contact with the ductor roller, and wherein there is a division of the subsequent ink-feed path, an interruption of the feed path upstream of the division is provided simultaneously with the movement of the transfer roller to its rest position. In the embodiment of Fig. 3, grooved transfer roller 2 is movable between position 2a where it contacts ductor roller 1 and position 2b where it is out of contact. The bearings 7 of the roller 2 are mounted on the ends of double-arm levers 12 pivoted at A, the other ends being forked and supporting the bearings 11 of roller 4. Thus movement of levers 12 under the action of springs 13 trips roller 4 away from roller 5 while leaving first feed roller 3 in contact with both rollers 2 and 4. In alternative embodiments either the first feed roller 3 or the second feed roller 4 have bearings on inclined surfaces (6), Figs. 1 and 2 (not shown), so that movement of roller 2 away from ductor 1 automatically trips the relevant ink-feed roller. It is stated that the provision of such an interruption in the feed path helps to minimize evening-out of the ink thickness gradient along the rollers and enables a speedier return to the required condition after stopping ink-feed at the ductor.
Patent GB-1406668-A (GB)
Title: Control unit for spraying nozzles
IPC: A43D25/18
Filed: 1972-09-08
Abstract: 1406668 Spray coating apparatus ZAVODY PRESNEHO STROJIRENSTVI GOTTWALDOV NARODNI PODNIK 8 Sept 1972 [10 Sept 1971] 41936/72 Heading B2L Spray apparatus for applying adhesive to lasted sole and heel members comprises a pair of spray heads 1 which are pivotable away from each other by the action of a cam 5 on followers 20 and are mounted on a support 8 which is movable horizontally and vertically by a cam 10 acting in a hole 9 therein. As shown the guns are pivotally mounted on a support 2 which is fixed to the support 8, through a portion 7. An hydraulic cylinder 35 has a rack 33 on the piston thereof which causes cam 10 to rotate and drive the support 8. Measured amounts of adhesive pass from a chamber 43 through channels in links 44 to a passageway 45 which leads to a valve member 11 in passageway 16. Pressure in the adhesive causes the valve 11 to rise against the action of a spring 19 connected thereto by lever 18 and holes 13 in valve 11 then lie opposite holes 14 in the valve body thus allowing egress of material.
Patent GB-1116747-A (GB)
Title: Method and apparatus for the production of felt and felt articles
Inventor: FLANAGAN GEORGE FRANCIS
IPC: D04H17/00
Filed: 1965-10-05
Abstract: 1,116,747. Forming felt. COMMONWEALTH SCIENTIFIC & INDUSTRIAL RESEARCH ORGANIZATION. 5 Oct., 1965, No. 42168/65. Heading D1R. A method of forming felt comprises arranging a mass of feltable fibrous material between relatively movable forming members and subjecting the material to pressure and periodic deformation, at least one forming member being of rubber or other like elastic material and the surface area thereof being either increased or decreased during the course of operation. The increase or decrease in surface area of the forming member may be continuous or intermittent. In one embodiment of apparatus carrying out the process, the felting apparatus is of the flat-harnener type, the feltable fibrous material being placed between opposed platens 16, 18, the upper platen 18 being reciprocable. An elastic belt 10 passes round guide rollers 12, 14 and over the top of the lower platen 16. One of the guide rollers i.e. roller 14, is laterally movable to increase or decrease the distance between the guide rollers and therefore the surface area of the belt. The felt may be in the form of a tubular article and to this end, the forming members comprise coaxial cylindrical members 22, 24, Fig. 2. The elastic forming member may be either the outer or inner cylindrical member and the feltable fibrous material is arranged in an annulus formed between the members. The surface area of the elastic forming member is either increased or decreased by means of fluid pressure. The inner and outer forming members are movable relative to each other, e.g. rotationally and axially, to provide shearing forces on the feltable fibrous material. In a still further embodiment, the feltable fibrous material is arranged around an elastic core member which is positioned between a plurality of parallel rollers, the diameter of the core member being either increased or decreased.